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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package javax.print;


This interface is used by a printing application to cancel a print job. This interface extends DocPrintJob. A DocPrintJob implementation returned from a print service implements this interface if the print job can be cancelled. Before trying to cancel a print job, the client needs to test if the DocPrintJob object returned from the print service actually implements this interface. Clients should never assume that a DocPrintJob implements this interface. A print service might support cancellation only for certain types of print data and representation class names. This means that only some of the DocPrintJob objects returned from a service will implement this interface. 
 Service implementors are encouraged to implement this optional interface and to deliver a PrintJobEvent.JOB_CANCELED event to any listeners if a job is successfully cancelled with an implementation of this interface. Services should also note that an implementation of this method may be made from a separate client thread than that which made the print request. Thus the implementation of this interface must be made thread safe. 
/**
 * This interface is used by a printing application to cancel a print job. This
 * interface extends {@link DocPrintJob}. A {@code DocPrintJob} implementation
 * returned from a print service implements this interface if the print job can
 * be cancelled. Before trying to cancel a print job, the client needs to test
 * if the {@code DocPrintJob} object returned from the print service actually
 * implements this interface. Clients should never assume that a
 * {@code DocPrintJob} implements this interface. A print service might support
 * cancellation only for certain types of print data and representation class
 * names. This means that only some of the {@code DocPrintJob} objects returned
 * from a service will implement this interface.
 * <p>
 * Service implementors are encouraged to implement this optional interface and
 * to deliver a {@link javax.print.event.PrintJobEvent#JOB_CANCELED} event to
 * any listeners if a job is successfully cancelled with an implementation of
 * this interface. Services should also note that an implementation of this
 * method may be made from a separate client thread than that which made the
 * print request. Thus the implementation of this interface must be made thread
 * safe.
 */
public interface CancelablePrintJob extends DocPrintJob {

    
Stops further processing of a print job.


If a service supports this method it cannot be concluded that job
cancellation will always succeed. A job may not be able to be cancelled
once it has reached and passed some point in its processing. A successful
cancellation means only that the entire job was not printed, some portion
may already have printed when cancel returns.

 The service will throw a PrintException if the cancellation did not succeed. A job which has not yet been submitted for printing should throw this exception. Cancelling an already successfully cancelled Print Job is not considered an error and will always succeed. 

Cancellation in some services may be a lengthy process, involving
requests to a server and processing of its print queue. Clients may wish
to execute cancel in a thread which does not affect application
execution.

Throws:
/**
     * Stops further processing of a print job.
     * <p>
     * If a service supports this method it cannot be concluded that job
     * cancellation will always succeed. A job may not be able to be cancelled
     * once it has reached and passed some point in its processing. A successful
     * cancellation means only that the entire job was not printed, some portion
     * may already have printed when cancel returns.
     * <p>
     * The service will throw a {@code PrintException} if the cancellation did
     * not succeed. A job which has not yet been submitted for printing should
     * throw this exception. Cancelling an already successfully cancelled Print
     * Job is not considered an error and will always succeed.
     * <p>
     * Cancellation in some services may be a lengthy process, involving
     * requests to a server and processing of its print queue. Clients may wish
     * to execute cancel in a thread which does not affect application
     * execution.
     *
     * @throws PrintException if the job could not be successfully cancelled
     */
    public void cancel() throws PrintException;
}